bDS/src/renderer/components/WindowTitleBar/WindowTitleBar.css

.window-titlebar {
  position: relative;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--vscode-editorGroupHeader-tabsBackground, #252526);
  border-bottom: 1px solid var(--vscode-editorGroupHeader-tabsBorder, #1e1e1e);
  flex-shrink: 0;
  app-region: drag;
  -webkit-app-region: drag;
  padding-right: calc(10px + var(--bds-titlebar-overlay-right, 0px));
}

.window-titlebar-menu-bar {
  display: flex;
  align-items: center;
  height: 100%;
  margin-left: 6px;
  gap: 2px;
  app-region: no-drag;
  -webkit-app-region: no-drag;
  z-index: 2;
}

.window-titlebar.is-mac .window-titlebar-menu-bar {
  margin-left: max(var(--bds-titlebar-macos-left-inset, 78px), calc(6px + var(--bds-titlebar-overlay-left, 0px)));
}

.window-titlebar-menu-button {
  height: 24px;
  border: none;
  background: transparent;
  color: var(--vscode-titleBar-activeForeground, var(--vscode-foreground, #cccccc));
  padding: 0 8px;
  border-radius: 4px;
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
}

.window-titlebar-menu-button:focus,
.window-titlebar-menu-button:focus-visible {
  outline: none;
  box-shadow: none;
}

.window-titlebar-menu-button:hover,
.window-titlebar-menu-button.is-active {
  background-color: var(--vscode-toolbar-hoverBackground, rgba(90, 93, 94, 0.31));
}

.window-titlebar-menu-mnemonic {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.window-titlebar-menu-dropdown {
  position: absolute;
  top: 30px;
  min-width: 210px;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background-color: var(--vscode-menu-background, #252526);
  border: 1px solid var(--vscode-menu-border, #454545);
  border-radius: 6px;
  box-shadow: var(--vscode-widget-shadow, 0 8px 24px rgba(0, 0, 0, 0.4));
  app-region: no-drag;
  -webkit-app-region: no-drag;
  z-index: 10;
}

.window-titlebar-menu-item {
  border: none;
  background: transparent;
  color: var(--vscode-menu-foreground, var(--vscode-foreground, #cccccc));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  border-radius: 4px;
  padding: 6px 8px;
  font-size: 12px;
  cursor: pointer;
}

.window-titlebar-menu-item:focus,
.window-titlebar-menu-item:focus-visible {
  outline: none;
  box-shadow: none;
  background-color: var(--vscode-toolbar-hoverBackground, rgba(90, 93, 94, 0.31));
}

.window-titlebar-menu-item:hover {
  background-color: var(--vscode-menu-selectionBackground, rgba(9, 71, 113, 0.45));
}

.window-titlebar-menu-item.is-keyboard-active {
  background-color: var(--vscode-menu-selectionBackground, rgba(9, 71, 113, 0.45));
}

.window-titlebar-menu-item-accelerator {
  opacity: 0.8;
}

.window-titlebar-menu-separator {
  height: 1px;
  margin: 4px 2px;
  background-color: var(--vscode-menu-separatorBackground, rgba(255, 255, 255, 0.08));
}

.window-titlebar-drag-region {
  flex: 1;
  height: 100%;
}

.window-titlebar-title {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  max-width: 45%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--vscode-titleBar-activeForeground, var(--vscode-foreground, #cccccc));
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  user-select: none;
  pointer-events: none;
}

.window-titlebar-actions {
  height: 100%;
  display: flex;
  align-items: center;
  margin-right: 6px;
}

.window-titlebar-action-button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  padding: 0;
  line-height: 0;
  background: transparent;
  border: none;
  color: var(--vscode-foreground, #cccccc);
  cursor: pointer;
  border-radius: 4px;
  app-region: no-drag;
  -webkit-app-region: no-drag;
}

.window-titlebar-action-button:focus,
.window-titlebar-action-button:focus-visible {
  outline: none;
  box-shadow: none;
}

.window-titlebar-sidebar-icon {
  width: 14px;
  height: 14px;
  border: 1.5px solid currentColor;
  border-radius: 2px;
  display: block;
  position: relative;
  overflow: hidden;
}

.window-titlebar-sidebar-icon::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 33.3333%;
  width: 1.5px;
  transform: translateX(-50%);
  background-color: currentColor;
}

.window-titlebar-sidebar-pane {
  position: absolute;
  left: 0;
  top: 0;
  width: 33.3333%;
  height: 100%;
  background-color: currentColor;
  transition: opacity 120ms ease;
}

.window-titlebar-sidebar-icon.is-inactive .window-titlebar-sidebar-pane {
  opacity: 0;
}

.window-titlebar-panel-icon {
  width: 14px;
  height: 14px;
  border: 1.5px solid currentColor;
  border-radius: 2px;
  display: block;
  position: relative;
  overflow: hidden;
}

.window-titlebar-panel-icon::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 66.6667%;
  height: 1.5px;
  transform: translateY(-50%);
  background-color: currentColor;
}

.window-titlebar-panel-pane {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 33.3333%;
  background-color: currentColor;
  transition: opacity 120ms ease;
}

.window-titlebar-panel-icon.is-inactive .window-titlebar-panel-pane {
  opacity: 0;
}

.window-titlebar-assistant-icon {
  width: 14px;
  height: 14px;
  border: 1.5px solid currentColor;
  border-radius: 2px;
  display: block;
  position: relative;
  overflow: hidden;
}

.window-titlebar-assistant-icon::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 66.6667%;
  width: 1.5px;
  transform: translateX(-50%);
  background-color: currentColor;
}

.window-titlebar-assistant-pane {
  position: absolute;
  right: 0;
  top: 0;
  width: 33.3333%;
  height: 100%;
  background-color: currentColor;
  transition: opacity 120ms ease;
}

.window-titlebar-assistant-icon.is-inactive .window-titlebar-assistant-pane {
  opacity: 0;
}

.window-titlebar-action-button:hover {
  background-color: var(--vscode-toolbar-hoverBackground, rgba(90, 93, 94, 0.31));
}

.window-titlebar-action-button:active {
  background-color: var(--vscode-toolbar-activeBackground, rgba(99, 102, 103, 0.31));
}